Water-tube boiler.



J. E. BELL.

' WATER TUBE BOILER.

APPLICATION FILED JUIYB, 19074 Patented Feb. 23, 1915.

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INVENTOR WITNESSES J. E. BELL.

WATER TUBE BOILER.

APPLICATION FILED JULY 8, 1907.

1,129,538. PatentedFeb. 23, 1915.

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WITNESSES INVENTOR @MMT 6 /w Y MM UNITED STATES PATENT euries.

JOHN E. BELL, OF NEW YORK, N. Y., ASSIGNOR TO THE BABCOCK @c WILCOX COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

WATER-TUBE BOILER.

Application filed July 8, 1907.

To all whom it may concern Be it known that I, JOHN E. BELL, of New York city, in the county and State of New York, have invented a new and useful Water-Tube Boiler', of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a sectional side elevation show` ing one form of boiler constructed in accoi-dance with my invention; and Figs. 2 and 3 are diagrau-.n'iatic sectional side elevations showing modified forms.

The invention relates to boilers of the transverse-drum, multiple-bank, serial-pass type, and is designed to provide an improved arrangement of baling whereby the gases are closely held in contact with the tubes. It is also designed to increase the amount of 'heating surface exposed to radiant heat.

A further object is to decrease liability to the formation of steam pockets in the front bank of tubes and insure a high velocity of the gases.

In Fig. l of the drawings, I how my invention as applied to a four-drum, three bank Stirling type of boiler. In this case. 2, 3 and 4 are upper transverse steam and waterdrums, connected by banks of tubes 5, 6 and 7 with a lower transverse mud drinn 8. Two or three transverse mud drums may be employed, either or all of which may be connected by rows of tubes. The. tubes may be curved at their ends, or the drums may be struck up so as to employ straight tubes. In the form shown, 9 are water circulators connecting the water spaces of the two front upper drums. and 1.0 and 1l are steam circulators `leading the steam from the front and rear drumsl to the middle drums, whence it is taken off. I have shown the front bank of tubes as leaning forwardly over the com bustion chamber, this combustion chamber being freely open in its upper portion so as to expose the front wall of the setting to the heat, no roof or arch being used over the grate. Such arch may, however, be employed within the scope of my broader claims relating to the batlling. In this form, the refractorybaflling consists of a baille 12 extending upwardly from the mud drum between the first and second row of the front bank of tubes. The next battle 13 ex- Specification of Letters Patent.

Patented Feb. 23, 1915.

Serial No. 382,588.

tends from the upper steam and water drum downwardly along the rear of the front bank of tubes, being preferably supported by tension rods 14. The third baille 15 extends along the rear of the second bank of tubes with an opening over its upper end, a shelf 16 being employed to hold the gases within the rear bank 7 in their last down pass to the oitake port 17. I have shown the water as fed into the rear upper drum through pipe 18. In the operation of the boiler, the gases flow up the front row of tubesof the front bank, thence down among the front bank of tubes, thence up the middle bank, and down the rear bank to the outlet flue. lVith the form of furnace shown, the size of the combustion chamber is increased, the smoke reduced to a minimum, and increased economy obtained. The front wall of the boiler setting will become highlyr heated, and the will be exposed to heated fire brick to substantially the same extent as with the arch or roof construction commonly employed in boilers of this type. In the present form, the front row of tubes is exposed to the radiating surface formed by the front wall, thus increasing the amount of radiant heat received by the tnbeheating surface. As the furnace gases enter the front bank of tubes near their upper ends, the steam will be most rapidly generated in this upper portion of the tubes, and has only a short distance to travel into the front upper drum. This gives less liability to the formation of steam pockets and possible reversing of circulation. rIhc tubes of the front bank which are in the rear of the front baille receivev the gases nea r their upper ends at the first Contact thereof, and the major portion of the steam in these tubes is generated in their upper parts, whereas with the old style baiiling, the most of the steam was produced in the lower portions of the tubes where the steam might readily pass to the mud drum rather than flow up through the tubes to the steam and water drum. In the front row of tubes of the frontbanlc. the production of steam in the lower portion is of course not diminished in the form of Fig. 1, but as there is more steam generated in the upper portion of the bank there is less liability for reversal of circulation. It also gives a narrow pass through which the gases must flow at high velocity, insuring the maximum amount of lng absorbed per square foot of heat- ...ioei The furnacemay be employed ept that the baille 12 is composed ...oef briols or tiles which incloses the aw of tubes. In' this case the front will only be directly exposed to the above the end. of the baille. In this parte similar to those of Fig. l are ated by similar numerals with the letapplied. 3 ll show a form similarto that of l., except that. the liront baille is obby bonding' portions of the' second l 'nbes 5b into the between the of tubes along the bathing porupper portions of the second row m, in their normal position0 will allow the to slow through after they reach the ond of the forwardly bent portions. the wor 1s baille element in my im not only auch those l have onu. all other forms. Yl also intend, my claims, to cover the structure whether .more mud drqms or lower water is used. l: tubes may be straight or curved; the steam and Water drums or mud :.51 be varied; two or more banks may be used; and many other Y may be made 'without departing ny invention.

l. ola-Einf 'The combination of a steam boiler fur- .nar having; a. combustion. chamber at the front tine-enf and a drum in the lower portion thereof, series of tubes extending upwarijlly from the drum,the front series being l ated at the roar of the combustion chambf 1 with the front setting wall facing it, a infile extending upwardly from' the drum at the front of the front series of tubes -and instituting: the back of the combustion r, and alternately downwardly and only projecting ba'llles behind'the lirst onrfl baille and providing means for f the products of combustion longin ,ly oi the series of tubes behind the inent'ioinxd series, the last heating suroyer which the products pass consistrib-ed.

J e combination of a steam boiler funace having a combustion chamber at the iront thereof and a drum in the lower portion thereof, series of tubes extending' uply from the drum, the front series be ited at the rear of the combustion will: the front setting wall facing llo extending' upwardly from the L. oi? the liront series of i the back of the comcoal, oil inirays or any other desirable' nis, 'l intend to cover any form of baf-v water beating' surface; substantially bustion chamber, and alternately downn wardly and upwardly projecting bellies behind the first mentioned baille and providing' means for directing' the 'products of com bustion longitudinally of the series of tubes behind the first mentioned series,'the major portion of the water heatiiri,T surface in. 'the first downward pass of the gases consisting of tubes of the front bank, and the last heating surface over which. the produ-ets pass consisting oi a water heat-ingr suraee, substantially as described..

The combination of a steam. boiler furnace having a combustion Chamber at the front thereof and a transverse drum in the lower portion thereof, a, plurality of upper transverse steam and water drums having sets'ol tubes extending1 dmvi'nvardly to the lower drum, the front series being,-r loeaed at the rear of the combustion Lhamber with l' 'front furnace setting wall facing it, a ballie element tonstitutinrr the baci( ot' the combustion chamber and extendingr lniwardly from the drum in the front portion of the iront set of tubes, and. terminating short the front steam and water drum, and. baiiling in. rear of the front baille elen'ient and arranged to direct the gases downwardly and upwardly among the succeeding sets of tubes, the last heating surface over which the prod.- ue'ts pass consisting of a water heating' surface, substantially as described.

4. The combination of a steam boiler furnace havingr .a combustion chamber at the front thereof and a mud drum inthe lower portion thereof, a plurality of upper transverse steam and water drums having series of tubes extending' downwardly to the mnd drum, the front series being .located at the rear of the combustion ohan'iber with the front setting wall facing it, a baille elenient constituting the back of tho eon1bustion chamber and extending upwardly in front of tubes in tho Yfront seriesand termi-Y nating short of the `front steam and water drinn, and balllinp,r in the rear of the 'liront baille element and arranged to direct the gases upwardly and downwardly among' the succeeding' sets of tubes, said balllinggr direct ingY the ,frases downwardly in the last i'iass amongr the rear set of water tubes.v substan tially as described. l

5. The combination of a steam boiler for nace having a combustion chamber at the l" ront thereof and three upper transverse steam and water drums connected by banks of tubes to a lower mud drum, the front .bank oli tubes being located at the rear of the eoinbustion rliauibor with the front setting' wall facing it, a baille extending upwardly at the front ol the l'ront bank and forming the bark ot the combustion chainber :rnd terminatimgr .short ol the ironie' nani and water 1li-um. and .mrremling lrxllles ar ranged to dii-eet the gases allernately.downwardly and upwardly, said bales being arranged to direct the gases upwardly among the tubes of the middle bank and down- Wardly among the water tubes of the rear bank, substantialj.Y as described.

6. The combination of a steam boiler furnace having a combustion chamber at the front thereof, three upper transverse steam and water drums, the two front steam-and water drums having water circulators extending between them, three banks of tubes connecting said steam and water drums with a lower mud drum, the front bank of tubes being located at the rear of the combustion chamber and facing the front setting wall, a baffle element forming the backof the combustion chamber and extending upwardly at the front of the front bank and terminating short of the upper drum, and succeeding baflling arranged to direct the gases alternately downwardly and vupwardly, said baflling directing the gases downwardly among the tubes of the last or 'third bank. substantially as described.

7. In a vertical water tube boiler, the combination with a combustion chamber, transverse upper steam and water drums, a lower lnud drum, and a plurality' of banks of upwardly extending tubes connecting the same, the front bank inclining upwardly and forwardly over the combustion chamber and facing the front setting wall, of a baffle extending upwardly and'longitudinally along the front of the first bank from the lower end thereof and terminatin short of the upper end thereof, said ballble constituting the rear wall of said combustion chamber and the exit from said combustion chamber being over said baffle, and among the upper end of the first bank of tubes, and another baflle extending longitudinally along the rear of said first bank from the upper end thereof, and terminating short of the'lower end, said baffle thereby compelling the heated gases to first strike the upper end of the first bank and then traverse the said rst bank longitudinally downwardly from its upper to its lower end and counter to the circulation in the tubes of said bank, substantially as described.

8. The combination with ay steam boiler furnace havinga combustion chamber at the front thereof and a drum in its lower portion, and series of tubes extending upwardly from the drum, the front series being located at the rear of the 'combustion chamber and facing the front setting wall, of a baflle extending upwardly in front of tubes of the front series, and constituting the back of the combustion Chagnber, and 'alternate downwardly and upwardly projecting baflles behind the first mentioned baille and providing means for directing the products of combustion along the series of tubes behind the first mentioned series, the heating surface of the first downward pass consisting mainly of water tubes of the front bank, and the furnace setting having an outlet for gases adjacent to the llower portion of the rear bank of water tubes, substantially as described.

9. The combination of a steam boiler furnace having a substantially unobstructed combustion chamber at the front thereof, and a drum in its lower portion, a series of tubes extending upwardly from the drum, the front series being located at the rear of the combustion chamber and facing the front setting wall, a baffle device at the back of the furnace cutting ofl' the lower portion of the majority of the tubes of the front bank from the furnace and having its upper part located between the rows of tubes of the front bank, and succeeding baffles for the other series of tubes, the major part of the heating surface of thefirst bank lying in the first downward pass of the gases, substantially as described. I

10. The combination, with a steam boiler furnace of the general Stirling type'having a combustion chamber at the front thereof and a drum in the lower portion thereof and series of tubes extending upwardly from the drum, the front series being located at the' rear of the combustion chamber, of a bale extending upwardly from the drum at the front of the front series of tubes and constituting the back of the combustion chamber, and alternately downwardly and upwardly projecting baflles behind the first mentioned baffle and providing means for directing the products of combustion longitudinally of the series of tubes behind the first mentioned series, substantially as described.

11. A transverse-drum serial-pass multiple-bank boiler having the banks provided with baflles, the bank with which the flame and hot gases first contact supporting a baffle in front of some of the tubes thereof, said baflle forming the rear of the combustion chamber; substantially as described.

l2. A transverse-drum serial-pass multiple-bank boiler having the banks provided with ballles, the bank with which the flame and hot gases first Contact supporting a baille. at the front thereof, said baffle forming the rear of the combustion chamber; substantially as described.

13. nh transverSe-drum serial-pass multiple-bank boiler having the banks provided with baflles, the bank with which the flame and hot gases first contact supporting a baille at the front of said bank and having a baille at the rear of said bank; substantially as described.

14. A steam boiler having a plurality of upper transverse steam and water drums, a lower transverse mud-drum, banks of tubes connecting said upper and lower drums, a

furnace, the first bank of tubes having two bales supported by the tubes, one of said balles being at the front and extending up ward to the upper part of the bank and forming the rear wall of the furnace conibustion chamber, and the second of said batlles being at the rear of the first bank of tubes to cause the gases to flow downward over the tirst bank; substantially as described.

15. A transverse-drum serial-pass multiple-bank boiler having the'banks' provided with baflling, the bank with which the flame and hot gases first contact being provided with a baille at the front and extending upward from the Inud drum 'for directing the gases to the upper -part of the bank, and with a baille at the rear to direct the gases downward, and a baille extending upward from the mud drum at the rear of the middle bank of tubes to direct the gases upward along the tubes of said bank; substantially as described. Y

16. JA steam boiler having a plurality of upper transverse steam and water drums, a lower transverse water drum, banks of tubes connecting said upper and ,lower drums, a furnace, the front bank having a baile supported upon a row of tubes at the front there-- of to direct the gases to the upper part of the front bank, and succeeding baliles to cause the gases to flow over the tubes of the remaining banks, and finally downward over the tubes of the 'rear bank; substantially as described.

l?. Asteam boiler having a plurality of upper steam and water drums, a lower water drum, banks of tubes connecting said upper and lower drums, a furnace, the front bank having a baille supported upon a row of tubes at the front thereof to direct the gases to the upper part of the front bank, succeeding ballles to cause the gases to How upward along'the tubes of the middle bank, a baille shelf between the middle and rear banks to direct the gases to the upper part of the tubes of the rear bank, and a flue outlet or opening for the escape of the gases near the lower part of the rear bank to cause the gases to flow the entire surface of the tubes of the rear bank; substantially as described.`

In testimony whereof, I have hereunto set my hand.

JOHN E. BELL. Witnesses:

Gr. H. VANNEMAGHER, ESTHER B. KLUG.

downward substantially over 

